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Visibility Maps by Field Sketching
Journal of Forestry, 1931Abstract The value of lookout stations as primary detection systems is well enough appreciated but often too little is known of their individual or collective visibility efficiency. Without an investigation of the area actually and directly visible, selection of lookout stations cannot be intelligently made, and the effectiveness of an ...
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Alessandro Zorzi's sketch maps
2017In 16th-century Venice, a little-known man called Alessandro Zorzi compiled several notebooks with letters and news about geographic discoveries, along with numerous sketches and comments. The most famous of his manuscripts, entitled Alberico, is devoted to news regarding America.
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